Hole Buster ™ Super Premium Reamers 3 Flats on Shank
50-UB
Special Hi-Tungsten tool steel, gold surface treated body and clearance for maximum lubricity. These reamers are especially designed for the reaming of structural steel plate commonly found in truck frames, rail cars, bridges and pressure vessels. For use only to enlarge previously formed or drilled holes. All tools are constructed with left hand spiral and right hand cut. The left hand spiral eliminates the tendency of the reamer to hog into holes.
Part # | Diameter | Point Diameter |
Minimum Starting Hole Size |
Overall Length |
Shank Diameter |
06390 | 3/8 | 0.250 | 5/16 | 4-5/8 | 3/8 |
06400 | 1/2 | 0.281 | 3/8 | 5-7/8 | 1/2 |
06410 | 9/16 | 0.343 | 7/16 | 5-7/8 | 1/2 |
06420 | 5/8 | 0.343 | 7/16 | 6-3/8 | 1/2 |
06430 | 11/16 | 0.375 | 15/32 | 6-3/8 | 1/2 |
06440 | 3/4 | 0.406 | 1/2 | 6-7/8 | 1/2 |
06450 | 13/16 | 0.468 | 35/64 | 6-7/8 | 1/2 |
06460 | 7/8 | 0.500 | 19/32 | 6-7/8 | 1/2 |
06470 | 15/16 | 0.585 | 5/8 | 6-7/8 | 1/2 |
06480 | 1" | 0.594 | 7/8 | 6-7/8 | 1/2 |
06484 | 1-1/4 | 0.719 | 1" | 6-7/8 | 1/2 |
SET | |||||
12270 | CR-4SP | 3/8, 1/2, 5/8, 3/4 |
Fast Spiral Hole Buster ™ Super Premium Reamers 3 Flats on Shank
51-UB
Special Hi-Tungsten tool steel, gold surface treated body and clearance for maximum lubricity. These reamers are especially designed for the reaming of structural steel plates commonly found in truck frames, rail cars, bridges, and pressure vessels. For use only to enlarge previously formed or drilled holes. All tools are constructed with left-hand spiral and right-hand cut. The left-hand spiral eliminates the tendency of the reamer to hog into holes.The 51-UB, with the fast spiral, is the more aggressive of the two styles. It also will fit the needs of users who prefer a stop collar.
Part # | Diameter | Point Diameter |
Minimum Starting Hole Size |
Overall Length |
Shank Diameter |
06381 | 5/16 | 0.215 | 17/64 | 4-5/8 | 5/16 |
06391 | 3/8 | 0.250 | 5/16 | 5-7/8 | 3/8 |
06501 | 7/16 | 0.250 | 3/8 | 5-3/8 | 7/16 |
06401 | 1/2 | 0.281 | 3/8 | 5-7/8 | 1/2 |
06411 | 9/16 | 0.343 | 7/16 | 5-7/8 | 1/2 |
06421 | 5/8 | 0.343 | 7/16 | 6-3/8 | 1/2 |
06432 | 0.652 | 0.375 | 15/32 | 6-3/8 | 1/2 |
06431 | 11/16 | 0.375 | 15/32 | 6-3/8 | 1/2 |
06441 | 3/4 | 0.406 | 1/2 | 6-7/8 | 1/2 |
06531 | 0.776 | 0.406 | 1/2 | 6-7/8 | 1/2 |
06451 | 13/16 | 0.468 | 35/64 | 6-7/8 | 1/2 |
06461 | 7/8 | 0.500 | 19/32 | 6-7/8 | 1/2 |
06471 | 15/16 | 0.585 | 5/8 | 6-7/8 | 1/2 |
06481 | 1" | 0.594 | 7/8 | 6-7/8 | 1/2 |
06491 | 1-1/16 | 0.807 | 7/8 | 6-7/8 | 1/2 |
06482 | 1-1/4 | 0.719 | 1" | 6-7/8 | 1/2 |
Sets | |||||
12271 | CR-4FS | 3/8, 1/2, 5/8, 3/4 | |||
12281 | SM-4FS | 5/16, 3/8, 7/16, 1/2 |
Hole Buster ™ Super Premium Spiral Flute Hex Nut Reamers
52-UB Bridge Length or
53-UB CAR Length
Special Hi-Tungsten tool steel, gold surface treated body and clearance for maximum lubricity. These reamers are especially designed for the reaming of structural steel plate commonly found in truck frames, rail cars, bridges and pressure vessels. For use only to enlarge previously formed or drilled holes. All tools are constructed with left hand spiral and right hand cut. The left hand spiral eliminates the tendency of the reamer to hog into holes.
Type 52-UB Bridge Length
Part # | Diameter | Hex Nut Size |
Flute Length |
Overall Length |
20480-V | 9/16 | 1-1/16 | 5-1/8 | 6-7/8 |
20490-V | 5/8 | 1-1/16 | 6-1/8 | 7-7/8 |
20510-V | 11/16 | 1-1/16 | 7-1/8 | 9-1/4 |
20520-V | 3/4 | 1-1/4 | 7-3/8 | 9-3/8 |
20530-V | 13/16 | 1-1/4 | 7-3/8 | 9-3/8 |
20540-V | 7/8 | 1-7/16 | 7-3/8 | 9-3/8 |
20550-V | 15/16 | 1-7/16 | 7-3/8 | 9-3/8 |
20560-V | 1" | 1-7/16 | 7-3/8 | 9-3/8 |
20570-V | 1-1/16 | 1-5/8 | 7-3/8 | 9-3/8 |
20500-V | 1-1/8 | 1-5/8 | 7-3/8 | 9-3/8 |
20580-V | 1-3/16 | 1-13/16 | 7-3/8 | 9-3/8 |
20590-V | 1-5/16 | 2" | 7-3/8 | 10 |
21120-V | 1-3/8 | 2" | 7-3/8 | 10 |
21130-V | 1-7/16 | 2" | 7-3/8 | 10 |
21140-V | 1-1/2 | 2" | 7-3/8 | 10 |
21150-V | 1-9/16 | 2" | 7-3/8 | 10 |
21160-V | 1-5/8 | 2" | 7-1/2 | 10 |
Type 53-UB Car Length
Part # | Diameter | Hex Nut Size |
Flute Length |
Overall Length |
35580-V | 9/16 | 1-1/16 | 4 | 5-1/2 |
35590-V | 5/8 | 1-1/16 | 4-1/2 | 6 |
35610-V | 11/16 | 1-1/16 | 4-1/2 | 6-3/8 |
35620-V | 3/4 | 1-1/4 | 5 | 7 |
35630-V | 13/16 | 1-1/4 | 5 | 7 |
35640-V | 7/8 | 1-7/16 | 5 | 7 |
35650-V | 15/16 | 1-7/16 | 5 | 7 |
35660-V | 1" | 1-7/16 | 5 | 7 |
35670-V | 1-1/16 | 1-5/8 | 5 | 7 |
35600-V | 1-1/8 | 1-5/8 | 5 | 7 |
35680-V | 1-3/16 | 1-13/16 | 5 | 7 |
35690-V | 1-5/16 | 2" | 5 | 7-7/8 |
Type 54-UB & 55-UB Bridge Reamers -
Straight & Spiral Flutes - Taper Shank High-Speed Steel, Surface Treated
These special Hi-Tungsten tool steel reamers with gold surface treated body and clearance are designed to be used with Morse Taper shank equipment. They are available in both straight and spiral flute configuration and are designed for heavy-duty reaming as encountered in the fabrication of structural steel assemblies, bridge erection, and ship construction. The tapered design permits the reamer to enter out-of-line holes often encountered in structural work.
54-UB
Straight Flute
Part # | Diameter | Flute Length |
Overall Length |
Morse Taper |
81630-V | 7/16 | 4-3/8 | 8-1/4 | #2 |
81640-V | 1/2 | 5-1/8 | 9 | #2 |
81650-V | 9/16 | 5-1/8 | 9 | #2 |
81660-V | 5/8 | 6-1/8 | 10 | #2 |
81670-V | 11/16 | 7-1/8 | 11-3/4 | #3 |
81680-V | 3/4 | 7-3/8 | 12 | #3 |
81690-V | 13/16 | 7-3/8 | 12 | #3 |
81700-V | 7/8 | 7-3/8 | 12 | #3 |
81710-V | 15/16 | 7-3/8 | 12 | #3 |
81720-V | 1" | 7-3/8 | 12 | #3 |
81730-V | 1-1/16 | 7-3/8 | 12 | #3 |
81740-V | 1-1/8 | 7-3/8 | 12 | #3 |
81750-V | 1-3/16 | 7-3/8 | 12 | #3 |
81760-V | 1-1/4 | 7-3/8 | 13 | #4 |
81770-V | 1-5/16 | 7-3/8 | 13 | #4 |
55-UB
Spiral Flute
Part # | Diameter | Flute Length |
Overall Length |
Morse Taper |
83310-V | 7/16 | 4-3/8 | 8-1/4 | #2 |
83320-V | 1/2 | 5-1/8 | 9 | #2 |
83330-V | 9/16 | 5-1/8 | 9 | #2 |
83340-V | 5/8 | 6-1/8 | 10 | #2 |
83350-V | 11/16 | 7-1/8 | 11-3/4 | #3 |
83360-V | 3/4 | 7-3/8 | 12 | #3 |
83370-V | 13/16 | 7-3/8 | 12 | #3 |
83380-V | 7/8 | 7-3/8 | 12 | #3 |
83390-V | 15/16 | 7-3/8 | 12 | #3 |
83400-V | 1" | 7-3/8 | 12 | #3 |
83410-V | 1-1/16 | 7-3/8 | 12 | #3 |
83420-V | 1-1/8 | 7-3/8 | 12 | #3 |
83430-V | 1-3/16 | 7-3/8 | 12 | #3 |
83440-V | 1-1/4 | 7-3/8 | 13 | #4 |
83450-V | 1-5/16 | 7-3/8 | 13 | #4 |